On a part-time job, you are asked to bring a cylindrical iron rod of density 780

Question

On a part-time job, you are asked to bring a cylindrical iron rod of density 7800kg/m3 , length 88.5cm and diameter 3.00cm from a storage room to a machinist. Calculate the weight of the rod, w. The acceleration due to gravity, g = 9.81m/s2 . Express your answer numerically in newtons.
On a part-time job, you are asked to bring a cylindrical iron rod of density 7800kg/m3 , length 88.5cm and diameter 3.00cm from a storage room to a machinist. Calculate the weight of the rod, w. The acceleration due to gravity, g = 9.81m/s2 . Express your answer numerically in newtons.

Explanation / Answer

density = mass /volume

volume V = lbh = 3.14 * 0.015 *0.015 * 0.885 = 6.25*10^-4

now mass m =DV = 7800* 6.25*10^-4 = 4.877 kgs

thus weight W = mg = 4.877*9.8 = 47.79 N

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